State directory
Property tax resources in Illinois
Browse 102 county-level administrative profiles. Each profile brings together the local valuation authority, property lookup tools, collection channel, and 2026 relief and appeal guidance.
County directory
Every Illinois county in one view
Sorted alphabetically for fast field use.
CountyResponsible officeAuthority
Adams County17001Adams County Supervisor of AssessmentsCounty AssessorView profile Alexander County17003Alexander County Supervisor of AssessmentsCounty AssessorView profile Bond County17005Bond County Supervisor of AssessmentsCounty AssessorView profile Boone County17007Boone County Supervisor of AssessmentsCounty AssessorView profile Brown County17009Brown County Supervisor of AssessmentsCounty AssessorView profile Bureau County17011Bureau County Supervisor of AssessmentsCounty AssessorView profile Calhoun County17013Calhoun County Supervisor of AssessmentsCounty AssessorView profile Carroll County17015Carroll County Supervisor of AssessmentsCounty AssessorView profile Cass County17017Cass County Supervisor of AssessmentsCounty AssessorView profile Champaign County17019Champaign County Supervisor of AssessmentsCounty AssessorView profile Christian County17021Christian County Supervisor of AssessmentsCounty AssessorView profile Clark County17023Clark County Supervisor of AssessmentsCounty AssessorView profile Clay County17025Clay County Supervisor of AssessmentsCounty AssessorView profile Clinton County17027Clinton County Supervisor of AssessmentsCounty AssessorView profile Coles County17029Coles County Supervisor of AssessmentsCounty AssessorView profile Cook County17031Cook County Assessor's OfficeCounty AssessorView profile Crawford County17033Crawford County Supervisor of AssessmentsCounty AssessorView profile Cumberland County17035Cumberland County Supervisor of AssessmentsCounty AssessorView profile De Witt County17039De Witt County Supervisor of AssessmentsCounty AssessorView profile DeKalb County17037DeKalb County Supervisor of AssessmentsCounty AssessorView profile Douglas County17041Douglas County Supervisor of AssessmentsCounty AssessorView profile DuPage County17043DuPage County Supervisor of AssessmentsCounty AssessorView profile Edgar County17045Edgar County Supervisor of AssessmentsCounty AssessorView profile Edwards County17047Edwards County Supervisor of AssessmentsCounty AssessorView profile Effingham County17049Effingham County Supervisor of AssessmentsCounty AssessorView profile Fayette County17051Fayette County Supervisor of AssessmentsCounty AssessorView profile Ford County17053Ford County Supervisor of AssessmentsCounty AssessorView profile Franklin County17055Franklin County Supervisor of AssessmentsCounty AssessorView profile Fulton County17057Fulton County Supervisor of AssessmentsCounty AssessorView profile Gallatin County17059Gallatin County Supervisor of AssessmentsCounty AssessorView profile Greene County17061Greene County Supervisor of AssessmentsCounty AssessorView profile Grundy County17063Grundy County Supervisor of AssessmentsCounty AssessorView profile Hamilton County17065Hamilton County Supervisor of AssessmentsCounty AssessorView profile Hancock County17067Hancock County Supervisor of AssessmentsCounty AssessorView profile Hardin County17069Hardin County Supervisor of AssessmentsCounty AssessorView profile Henderson County17071Henderson County Supervisor of AssessmentsCounty AssessorView profile Henry County17073Henry County Supervisor of AssessmentsCounty AssessorView profile Iroquois County17075Iroquois County Supervisor of AssessmentsCounty AssessorView profile Jackson County17077Jackson County Supervisor of AssessmentsCounty AssessorView profile Jasper County17079Jasper County Supervisor of AssessmentsCounty AssessorView profile Jefferson County17081Jefferson County Supervisor of AssessmentsCounty AssessorView profile Jersey County17083Jersey County Supervisor of AssessmentsCounty AssessorView profile Jo Daviess County17085Jo Daviess County Supervisor of AssessmentsCounty AssessorView profile Johnson County17087Johnson County Supervisor of AssessmentsCounty AssessorView profile Kane County17089Kane County Supervisor of AssessmentsCounty AssessorView profile Kankakee County17091Kankakee County Supervisor of AssessmentsCounty AssessorView profile Kendall County17093Kendall County Supervisor of AssessmentsCounty AssessorView profile Knox County17095Knox County Supervisor of AssessmentsCounty AssessorView profile LaSalle County17099LaSalle County Supervisor of AssessmentsCounty AssessorView profile Lake County17097Lake County Supervisor of AssessmentsCounty AssessorView profile Lawrence County17101Lawrence County Supervisor of AssessmentsCounty AssessorView profile Lee County17103Lee County Supervisor of AssessmentsCounty AssessorView profile Livingston County17105Livingston County Supervisor of AssessmentsCounty AssessorView profile Logan County17107Logan County Supervisor of AssessmentsCounty AssessorView profile Macon County17115Macon County Supervisor of AssessmentsCounty AssessorView profile Macoupin County17117Macoupin County Supervisor of AssessmentsCounty AssessorView profile Madison County17119Madison County Supervisor of AssessmentsCounty AssessorView profile Marion County17121Marion County Supervisor of AssessmentsCounty AssessorView profile Marshall County17123Marshall County Supervisor of AssessmentsCounty AssessorView profile Mason County17125Mason County Supervisor of AssessmentsCounty AssessorView profile Massac County17127Massac County Supervisor of AssessmentsCounty AssessorView profile McDonough County17109McDonough County Supervisor of AssessmentsCounty AssessorView profile McHenry County17111McHenry County Supervisor of AssessmentsCounty AssessorView profile McLean County17113McLean County Supervisor of AssessmentsCounty AssessorView profile Menard County17129Menard County Supervisor of AssessmentsCounty AssessorView profile Mercer County17131Mercer County Supervisor of AssessmentsCounty AssessorView profile Monroe County17133Monroe County Supervisor of AssessmentsCounty AssessorView profile Montgomery County17135Montgomery County Supervisor of AssessmentsCounty AssessorView profile Morgan County17137Morgan County Supervisor of AssessmentsCounty AssessorView profile Moultrie County17139Moultrie County Supervisor of AssessmentsCounty AssessorView profile Ogle County17141Ogle County Supervisor of AssessmentsCounty AssessorView profile Peoria County17143Peoria County Supervisor of AssessmentsCounty AssessorView profile Perry County17145Perry County Supervisor of AssessmentsCounty AssessorView profile Piatt County17147Piatt County Supervisor of AssessmentsCounty AssessorView profile Pike County17149Pike County Supervisor of AssessmentsCounty AssessorView profile Pope County17151Pope County Supervisor of AssessmentsCounty AssessorView profile Pulaski County17153Pulaski County Supervisor of AssessmentsCounty AssessorView profile Putnam County17155Putnam County Supervisor of AssessmentsCounty AssessorView profile Randolph County17157Randolph County Supervisor of AssessmentsCounty AssessorView profile Richland County17159Richland County Supervisor of AssessmentsCounty AssessorView profile Rock Island County17161Rock Island County Supervisor of AssessmentsCounty AssessorView profile Saline County17165Saline County Supervisor of AssessmentsCounty AssessorView profile Sangamon County17167Sangamon County Supervisor of AssessmentsCounty AssessorView profile Schuyler County17169Schuyler County Supervisor of AssessmentsCounty AssessorView profile Scott County17171Scott County Supervisor of AssessmentsCounty AssessorView profile Shelby County17173Shelby County Supervisor of AssessmentsCounty AssessorView profile St. Clair County17163St. Clair County Assessor's OfficeCounty AssessorView profile Stark County17175Stark County Supervisor of AssessmentsCounty AssessorView profile Stephenson County17177Stephenson County Supervisor of AssessmentsCounty AssessorView profile Tazewell County17179Tazewell County Supervisor of AssessmentsCounty AssessorView profile Union County17181Union County Supervisor of AssessmentsCounty AssessorView profile Vermilion County17183Vermilion County Supervisor of AssessmentsCounty AssessorView profile Wabash County17185Wabash County Supervisor of AssessmentsCounty AssessorView profile Warren County17187Warren County Supervisor of AssessmentsCounty AssessorView profile Washington County17189Washington County Supervisor of AssessmentsCounty AssessorView profile Wayne County17191Wayne County Supervisor of AssessmentsCounty AssessorView profile White County17193White County Supervisor of AssessmentsCounty AssessorView profile Whiteside County17195Whiteside County Supervisor of AssessmentsCounty AssessorView profile Will County17197Will County Supervisor of AssessmentsCounty AssessorView profile Williamson County17199Williamson County Supervisor of AssessmentsCounty AssessorView profile Winnebago County17201Winnebago County Supervisor of AssessmentsCounty AssessorView profile Woodford County17203Woodford County Supervisor of AssessmentsCounty AssessorView profile